54998209 has 4 divisors (see below), whose sum is σ = 62855104. Its totient is φ = 47141316.

The previous prime is 54998201. The next prime is 54998219. The reversal of 54998209 is 90289945.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90289945 = 5 ⋅18057989.

It is a cyclic number.

It is not a de Polignac number, because 54998209 - 2³ = 54998201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54998201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3928437 + ... + 3928450.

It is an arithmetic number, because the mean of its divisors is an integer number (15713776).

Almost surely, 2^54998209 is an apocalyptic number.

It is an amenable number.

54998209 is a deficient number, since it is larger than the sum of its proper divisors (7856895).

54998209 is an equidigital number, since it uses as much as digits as its factorization.

54998209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7856894.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 54998209 is about 7416.0777369173. The cubic root of 54998209 is about 380.2911180993.

The spelling of 54998209 in words is "fifty-four million, nine hundred ninety-eight thousand, two hundred nine".